Author, as appears in the article.: Ferrando, Pere J; Morales-Vives, Fabia
Department: Psicologia
URV's Author/s: Ferrando Piera, Pere Joan / Morales Vives, Fàbia
Keywords: Item response theory Item redundancy Item discrimination Item analysis Factor analysis Clinical measurement item response theory item redundancy item analysis inventory factor analysis clinical measurement
Abstract: When developing new questionnaires, it is traditionally assumed that the items should be as discriminative as possible, as if this was always indicative of their quality. However, in some cases these high discriminations may be masking some problems such as redundancies, shared residuals, biased distributions, or model limitations which may contribute to inflate the discrimination estimates. Therefore, the inspection of these indices may lead to erroneous decisions about which items to keep or eliminate. To illustrate this problem, two different scenarios with real data are described. The first focuses on a questionnaire that contains an item apparently highly discriminant, but redundant. The second focuses on a clinical questionnaire administered to a community sample, which gives place to highly right-skewed item response distributions and inflated discriminant indices, despite the items do not discriminate well among the majority of participants. We propose some strategies and checks to identify these situations, so that the items that are inappropriate may be identified and removed. Therefore, this article seeks to promote a critical attitude, which may involve going against routine stablished principles when they are not appropriate.
Thematic Areas: Saúde coletiva Revistas ciencias del comportamiento Psychology, multidisciplinary Psychology (miscellaneous) Psychology (all) Psychology Psicología Medicina i General psychology Educação Ciencias sociales
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: perejoan.ferrando@urv.cat fabia.morales@urv.cat
Author identifier: 0000-0002-3133-5466 0000-0002-2095-0244
Record's date: 2024-10-12
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://revistas.um.es/analesps/article/view/535781
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Anales De Psicologia. 39 (3): 517-527
APA: Ferrando, Pere J; Morales-Vives, Fabia (2023). Is it quality, is it redundancy, or is model inadequacy? Some strategies for judging the appropriateness of high-discrimination items. Anales De Psicologia, 39(3), 517-527. DOI: 10.6018/analesps.535781
Article's DOI: 10.6018/analesps.535781
Entity: Universitat Rovira i Virgili
Journal publication year: 2023
Publication Type: Journal Publications